I was looking for self-amplified speakers, and I saw this one, I bought it and I don't regret it. 1 woofer, 2 amplifiers, 2 tweeters, quality sound, rich and powerful when needed. It has enough bass, but you can adjust it. If someone is looking for hi-fi sound, they should go elsewhere, okay. I like the sound it produces, plus it has the advantages I was looking for. The Bluetooth connects instantly to devices. I mainly use it with USB. Music, but also easy connection to the TV for movies. The app is very good, with controls for everything. Convenient size, not too heavy, I move it from room to room easily. Gym, living room, garden. That was the main reason I chose it. Panasonic is worth its money.